ACPAtmospheric Chemistry and PhysicsACPAtmos. Chem. Phys.1680-7324Copernicus PublicationsGöttingen, Germany10.5194/acp-10-10867-2010Atmospheric lifetimes and Ozone Depletion Potentials of trans-1-chloro-3,3,3-trifluoropropylene and trans-1,2-dichloroethylene in a three-dimensional modelPattenK. O.1WuebblesD. J.11Department of Atmospheric Sciences, University of Illinois, Urbana, Illinois USA1911201010221086710874This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/This article is available from http://www.atmos-chem-phys.net/10/10867/2010/acp-10-10867-2010.htmlThe full text article is available as a PDF file from http://www.atmos-chem-phys.net/10/10867/2010/acp-10-10867-2010.pdf

The chloroalkenes trans-1-chloro-3,3,3-trifluoropropylene (tCFP) and
trans-1,2-dichloroethylene (tDCE) have been proposed as candidate
replacements for other compounds in current use that cause concerns
regarding potential environmental effects including destruction of
stratospheric ozone. Because tCFP and tDCE contain chlorine atoms, the
effects of these short-lived compounds on stratospheric ozone must be
established. In this study, we derive the atmospheric lifetimes and Ozone
Depletion Potentials (ODPs) for tCFP and for tDCE assuming emissions from
land surfaces at latitudes 30° N to 60° N using the MOZART 3
three-dimensional model of atmospheric chemistry and physics. 53% of the
ozone loss due to tCFP and 98% of the ozone loss due to tDCE take place
in the troposphere, rather than in the stratosphere as generally expected
from longer-lived chlorocarbons. The atmospheric lifetime of tCFP against
chemical reaction is 40.4 days, and its ODP is quite small at 0.00034. The
tDCE atmospheric lifetime is 12.7 days, and its ODP is 0.00024, which is the
lowest ODP found for any chlorocarbon we have studied. Our study suggests
that chlorine from tCFP and tDCE are unlikely to affect ozone at quantities
likely to be emitted to the atmosphere.